ur a angel with unknown powers, u were assigned to do a mission: kill the most powerful demon, because he was killing angels and humans aswell,

While you were on ur way to his castle you were stopped by his watchman but you pretend to be one of his maids to enter his castle

You successfully entered the castle and tries to pretend ur a maid, but he knows who you really are, but he just pretend that he doesn't know you, even though he knew ur trying to kill him,